Silencer for gas heaters



Sept. 5, 1944. v r G. A. GUENTHER 2,357,325

7 SILENCER FOR GAS HEATERS I Filed Sept. 24, 1941 17) l I? V. Hllll'lll. 1 g /5 N Hllllh I i (I -1 "llHHH llHh.

ATTORNEYS Patented Sept. 5, 1944 SILENCER FOR GAS HEATERS George A. Guenther, Buffalo, N. Y., assignor to Leon H. Ballou, Lockport, N. Y.

Application September 24, 1941, Serial No. 412,143

3 Claims.

This invention relates to a silencer for use in connection with a housing or casing which encloses a heater such, for example, as that shown in Letters Patent of the United States No. 2,134,083.

It is one of the purposes of this invention to provide a silencer which can be incorporated in the enclosure of a heater of the type now on the market without requiring any change in the latter and without taking up any more space in a room in which the heater is installed.

A further object of this invention is to so construct this silencer that the same is readily and conveniently accessible for inspection, cleaning, servicing and repairing.

In the accompanying drawing:'

Fig. 1 is a fragmentary vertical longitudinal section of a heater having a silencer embodying this invention, this section being taken on line |l Fig. 2.

Fig. 2 is a vertical transverse section taken on line 2-2, Fig. 1.

In the following description similar characters of reference indicate like parts in both figures of the drawing.

Referring to Figs. 1 and 2, the numeral I represents the body of a housing in the lower part of which a burner of any suitable construction is arranged.

At its upper end the housing is provided with a removable cover consisting of a horizontal top plate H and a vertical flange I2 depending from the edge of the top plate and overhanging the outer side of the housing body. This cover is supported on the upper end of the housing body but separated therefrom so as to form a passage 13 between the upper end of the housing body .and the cover through which the air passes preparatory to being cleaned or filtered and then supplied to the burner to support combustion of the gas flame.

The means for cleaning the air which is 'supplied to th burner and also the means which prevent the creation of noise while conducting the cleaned air to the burner are arranged in the upper part of the housing.

Although various means may be employed for cleaning and filtering the air, those shown in the drawing are constructed as follows:

The numeral l4 represents an air cleaning chamber which is provided with upright walls l5 of sheet metal. The air which is to be cleaned before being supplied to the burner enters the chamber [4 partly at the top and partly at the bottom of this chamber. Screens or filters I6 with fine openings or mesh extend across the top and bottom of the chamber l4 and permit only cleaned air to pass through the same into the air chamber while dust and the like entrained in the air are separated and reassociated therewith whereby the air passing through this joint is prevented from making any noise. The preferred form of this slip joint and air silencer shown in the drawing is constructed as follows:

The numeral l9 represents a metal bracket secured to the inner side of one of the housing walls I O adjacent to the upper end thereof. This bracket has an L-shaped passage, the lower vertical outlet part 20 of which is connected with the upper end of the conduit l8 while the upper horizontal inlet part 2| thereof forms an inwardly opening socket into which is slipped a horizontal tubular coupling neck 22 of metal extending outwardly from the chamber air outlet H.

The means for silencing any noise which otherwise might be produced by air passing through this joint from the air chamber l4 tothe delivery conduit l8 include a lining consisting of non-vibrant or fibrous material, such as felt, which is placed in this joint so as to eliminate the projection of any metal corners or parts into the path of air, whichcorners or parts are liable to produce a whistling or disagreeable tone when engaged by a stream of air. In its preferred construction this lining and joint are constructed as follows:

For the purpose of installing this silencer the Outer part. I8 of the inlet of the passage through the bracket I9 is enlarged relative to the inner part thereof so as to form an annular inwardly facing shoulder 23 in the inlet end of this passage. This shoulder is engaged by a ring 24 of felt or similar non-vibrant or fibrous material which ring also opposes the outer end of the tubular neck 22 so as to prevent metallic contact between this neck and the bracket I9 and also covering the inner corner 25 of the shoulder 23 with felt so that the same is not exposed to a stream of air and therefore prevents the formation of noise.

The numeral 26 represents an outer tubular lining of felt or the like arranged between the periphery of the tubular air outlet neck 22 and the bore of the enlarged front or inlet part 2| of the air passage through the bracket l9, thereby preventing metallic contact between the outer side of this neck and this bracket and avoiding the possibility of producing noise. A similar inner tubularlining 2'! of felt or the like is placed within the bore of the tubular metal neck 22 and extended inwardly beyond the corner 28 between this neck and the respective wall l5 of the air chamber, as shown in Fig. 1, and thereby further guarding against the possibility of the stream of air striking a metal corner in this joint and producing a noise.

This slip joint between the air chamber and the conduit leading to the burner renders it possible to conveniently remove the air cleaning elements as a unit from the heater when it is desired to inspect, repair or clean any of the parts and also to reassemble these elements, which operations can be performed by simply withdrawing the tubular neck from the socket in the bracket [9 preparatory to servicing the apparatus and then slipping this neck back into this socket after this servicing has been accomplished.

In order to facilitate the introduction of the tubular neck 22 into the socket 2! and its outer lining tube 21 the outer or front ends of the tube 26 and the socket 2| are flared or made of forwardly enlarging conical form, as shown at 2'9, 38 in Fig. 1, thereby enabling this neck to be guided into the outer lining tube 26 easily and conveniently.

For the purpose of humidifying the air which is heated, a pan 3| containing water is placed within the housing between the air screening chamber and the cover ll of the housing.

I claim as my invention:

1. A sound insulating coupling for tubular conduits comprising a female tubular conduit mem- 2. A sound insulating coupling for tubular conduits comprising a female tubular conduit member having an enlarged bore forming a socket and a shoulder at the inner end of said socket, a fibrous ring arranged in said socket and engaging with said shoulder, an outer fibrous tube engaging its periphery with the bore of said socket and engaging its inner end with said fibrous ring, a male tubular conduit member engaging its periphery with the inner side of said outer fibrous tube and engaging its inner end with said fibrous ring, and an inner fibrous tube engaging its periphery with the bore of said male conduit member and engaging its inner end with said fibrous ring.

3. A sound insulating coupling fortubular conduits comprising a female tubular conduit member having an enlarged bore forming a socket and a shoulder at the inner end of said socket, a fibrous ring arranged in said socket and engaging with said shoulder, an outer fibrous tube engaging its periphery with the bore of said socket and engaging its inner end with said fibrous ring, a male tubular conduit member engaging its periphery with the inner side of said outer fibrous tube and engaging its inner end with said fibrous ring, and an inner fibrous tube engaging its periphery with the bore of said male conduit member and engaging its inner end with said fibrous ring, the outer ends of the bores 'of said female member and said outer fibrous tube 

